Summerlin South, NV climate
Summerlin South has mild winters and scorching summers, with very little rain. A typical July afternoon reaches 102°, a January night drops to 35°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Summerlin South feels like
Winter
Spring
Summer
Fall
Summerlin South weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 57° | 35° | 0.7" | 0 | 3 | 0 | 42° – 53° |
| February | 61° | 38° | 0.9" | 0 | 4 | 0 | 43° – 57° |
| March | 69° | 45° | 0.5" | 0 | 3 | 0 | 50° – 63° |
| April | 76° | 51° | 0.2" | 0 | 2 | 0 | 57° – 68° |
| May | 86° | 59° | 0.1" | 0 | 1 | 0 | 66° – 79° |
| June | 97° | 69° | 0.1" | 0 | 1 | 0 | 76° – 88° |
| July | 102° | 75° | 0.4" | 0 | 3 | 0 | 85° – 92° |
| August | 100° | 74° | 0.5" | 0 | 3 | 0 | 84° – 90° |
| September | 93° | 65° | 0.3" | 0 | 2 | 0 | 76° – 83° |
| October | 80° | 53° | 0.4" | 0 | 2 | 0 | 62° – 73° |
| November | 66° | 41° | 0.3" | 0 | 2 | 0 | 46° – 59° |
| December | 56° | 34° | 0.6" | 0.2" | 3 | 0 | 41° – 49° |
| Year | 78° | 53° | 4.9" | 0.2" | 29 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Summerlin South
Summerlin South gets 5 inches of rain and melted snow a year. February is the wettest month and June the driest. Rain or snow falls on about 29 days a year.
About 323 frost-free days a year
In half of years the last 32° night comes by January 24 and the first one by December 10. That leaves about 323 frost-free days for gardens, longer than 96% of U.S. towns.
Heating and cooling a home in Summerlin South
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Summerlin South, 37% of that work is heating and 63% is cooling, so air conditioning is the bigger bill.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Summerlin South and its neighbors
Summerlin South borders 2 towns with climate data. January nights across them vary by 1.1°. Las Vegas has both the coldest January nights (35°) and the hottest July afternoons (104°). Summerlin South’s January low is 35° and its July high 102°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Summerlin South compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Summerlin South averaged 1.8° warmer than the 1900s. The biggest change is in January (+2.9°). The shift is larger than in 88% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Summerlin South’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 43° to 57°. August is the most reliable, staying within 7°.
Common questions about Summerlin South’s climate
What is the coldest month in Summerlin South?
December, with a typical high of 56° and a low of 34°.
What is the hottest month in Summerlin South?
July, with a typical high of 102° and a low of 75°. About 136 days a year reach 90°.
How much snow does Summerlin South get?
Almost none. A normal year brings 0.2 inches.
When is the first frost in Summerlin South?
In half of years the first 32° night comes by December 10, and the last spring frost by January 24.
What is the rainiest month in Summerlin South?
February, with 0.9 inches of rain and melted snow. The year totals 5 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Summerlin South itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Las Vegas Wfo, NV (10 mi, snow) and Las Vegas Air Terminal, NV (10 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.